Brake for a bicycle



FIG. 1 is a top, right, front perspective view of a brake for a bicycleshowing my new design;

FIG. 2 is a top, right, rear perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a bottom view thereof.

The ornamental design for a brake for a bicycle, as shown and described.